Fetch ConsensusParameters from the database (FuelLabs#1809)

Related issue FuelLabs#1753

The change fetches the `ConsensusParameters` from the database and
caches it inside of the `ConsensusParametersProvider`. The
`ConsensusParametersProvider` has a service that runs in the background
and listens for a new block from the block importer. If a new block uses
a new consensus parameters version, the `ConsensusParametersProvider`
will update the internal `latest_consensus_parameters_version` variable
and cache a new `ConsensusParameters`.

### Before requesting review
- [x] I have reviewed the code myself

CHANGELOG.md

@@ -21,7 +21,8 @@ Description of the upcoming release here.
 - [#1812](https://github.com/FuelLabs/fuel-core/pull/1812): Follow-up PR to simplify the logic around parallel snapshot creation.
 
 ### Changed
-- [#1808](https://github.com/FuelLabs/fuel-core/pull/1808): Fetch consensus parameters from the database.
+- [#1809](https://github.com/FuelLabs/fuel-core/pull/1809): Fetch `ConsensusParameters` from the database
+- [#1808](https://github.com/FuelLabs/fuel-core/pull/1808): Fetch consensus parameters from the provider.
 
 ## [Version 0.24.2]
 

crates/fuel-core/src/service.rs

@@ -319,7 +319,7 @@ mod tests {
 
         // current services: graphql, graphql worker, txpool, PoA
         #[allow(unused_mut)]
-        let mut expected_services = 4;
+        let mut expected_services = 5;
 
         // Relayer service is disabled with `Config::local_node`.
         // #[cfg(feature = "relayer")]

crates/fuel-core/src/service/adapters.rs

@@ -16,7 +16,6 @@ use fuel_core_services::stream::BoxStream;
 #[cfg(feature = "p2p")]
 use fuel_core_types::services::p2p::peer_reputation::AppScore;
 use fuel_core_types::{
-    fuel_tx::ConsensusParameters,
     fuel_types::BlockHeight,
     services::block_importer::SharedImportResult,
 };
@@ -25,6 +24,7 @@ use std::sync::Arc;
 
 pub mod block_importer;
 pub mod consensus_module;
+pub mod consensus_parameters_provider;
 pub mod executor;
 pub mod graphql_api;
 #[cfg(feature = "p2p")]
@@ -38,14 +38,12 @@ pub mod txpool;
 
 #[derive(Debug, Clone)]
 pub struct ConsensusParametersProvider {
-    consensus_parameters: Arc<ConsensusParameters>,
+    shared_state: consensus_parameters_provider::SharedState,
 }
 
 impl ConsensusParametersProvider {
-    pub fn new(consensus_parameters: ConsensusParameters) -> Self {
-        Self {
-            consensus_parameters: Arc::new(consensus_parameters),
-        }
+    pub fn new(shared_state: consensus_parameters_provider::SharedState) -> Self {
+        Self { shared_state }
     }
 }